The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 26, 1991
Filed:
Oct. 31, 1990
Applicant:
Inventors:
Atsushi Okajima, Kariya, JP;
Yasuou Yamazaki, Nagoya, JP;
Yasuhide Okamoto, Nagoya, JP;
Masaei Nozawa, Okazaki, JP;
Yukihisa Takeuchi, Chita, JP;
Hajime Akado, Anjo, JP;
Assignee:
Nippondenso Co., Ltd., Kariya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01M / ;
U.S. Cl.
CPC ...
1231 / ; 1231 / ; 340438 ; 73 64 ;
Abstract
Additive is supplied to the lubricating oil by an additive supplying pump according to TBN of the lubricating oil which is detected by a TBN sensor which detects the current produced by the impressed voltage. TBN is kept between 0 and 2.